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If A , B ,C are angles of a triangles, t...

If `A , B ,C` are angles of a triangles, then the value of `e^(2i A)e^(-i C)e^(-i B)e^(-i C)e^(2i B)e^(-i A)e^(-i B)e^(-i A)e^(2i C)` is `1` b. `-1` c. `-2` d. `-4`

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RESONANCE DPP ENGLISH-JEE MAINS-All Questions
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